Today | Weather | Wednesday, October 22, 2025

Weather in Flagstaff, Arizona

04:20 AM
Now
Cloudy Night
43° F
Feels Like 41°
Precipitation 7 %
Wind 6 mph
Humidity 50 %
Today
Sunny with a Chance of Thunderstorms
Day 66°
Night 39°
Precipitation 55 %
Wind 13 mph
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Flagstaff Weather Forecast Updated

56 minutes ago
Last updated on

Air Quality in Flagstaff

NOW
39 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.03 µg/m³
PM10 14.17 µg/m³
O3 0.042 ppm
NO2 2.8 ppb
SO2 0.2 ppb
CO 0.12 ppm
NH3 1.03 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.56.03 µg/m³
PM1014.17 µg/m³
O382.68 µg/m³
NO25.27 µg/m³
SO20.51 µg/m³
CO133.99 µg/m³
NH31.03 µg/m³
NO0 µg/m³